Plug socket



Filed Dec. 8, 1925 INVgNTOR TI'ORNEY-u Patented May 6, 1930 UNITED STATES' ;PATENT OFFICE,

BERNARD F. MULDOON, MOUNTAIN VIEW, NEW JERSEY, ASSIGNOR. TO HENRY HYMAN, F BROOKLYN; NEW YORK PLUG socxnn:

Application filed December 8, 1925. -Seria1 No. 73,968.

My invention relates to plug sockets'and is tors due-to continued flexing .at the edge of particularly directed to the provision of such the casing. a device which shall be simple and easy of as- Heretofore it has been considered necessary sembly and at the same time will have 'adto secure the casing members together by two 5 vantages over articles of like character as or more screws. In the usual construction heretofore constructed. one of these screws is placed through the cas- My invention will be better understood by ing members near the front end thereof and reading the following description taken in within a short distance of the end of the casl connection with the accompanying drawings ing parts. In devices of this character it is showing an illustrative embodiment of the desired that there should be as little extra invention, and in which space around the sockets as possible because Fig. 1 is a view showing the inside of the of the difficulty of inserting the plugs if the casing members with the parts in place in sockets are not comparatively fixed. Furone of them; thermore, if too much space is provided so Fig. 2 is a longitudinal section on lin that the sockets would be free to move, the 5 II-II of Fig. 1; continual movement of them is likely to Fig. 3 is a lateral section on line IIIIII cause the electrical conductors to become of Fi 1 ith th t parts f. the easing broken and therefore disconnected. But besembled; cause of this necessity for closely confining 'Fig 4 i perspective ie of one f th the sockets and because of certain irregularisockets; and ties in manufacture due to the relative cheap- Fi 5 i a f t d i f th k t ness' of the articles and the large volume of shown in Fig. 4, v production, it frequentlyhappens with de- Referring th dra in th ti l vices as heretofore constructed that the priscs two cas ng parts 1 and 2 whi h ar /front part of the casing members breaks away substantially identical. Socket 3 nd 4 are because of the expansion of the sockets upon placed in suitable chamber i th in the introduction of the plugs. This is a seri- I members, there being substantially -h 1f; ous defect which has existed for a consider of the chambers provided in each casing part, able time in the By the use O my inven- 3o as Shown i Fi g d 3, Th k t 33 d tion I have overcome the difficulty of break- 1 40 spring member 8 is placed around the mem- 4may be of any well-known construction and g of the casing l? While retaining the per se constitute no t f my i ti desired close confinement of the sockets and Sockets of this character, however, are usualin a t have P1")duced an article which is 1y con tr t d so th t th expand upon the simpler in construction and easier t0 manuintroduction of the plugintb the socket. In facture and assemble h any l kImWn the particular illustration shown in the drawto In fact the devlce emboqymg my ings the sockets consist of two members 5 Ventlon may and preferably constructed so as to have only one screw 12 for holdin and 6 WhlCll are fastened together at 7 and a the part together and this Screw is P111663 preferably at about the center of the article and also preferably sufiiciently removed from the ends of the casing parts to be outside the bers 5 and 6 so as to hold them in the position shown in Fig. 4 while at the same time permlttlng them'to expand when h P 15 zone of expansibility of the sockets. It is I not essential that the screw be outside of the 45 A. 601.1 Sprmg Placed enlarged Zone of expansibility of the sockets so long end 10 0f the plug Socket, an-expanded poras it is far enough away from the front end 111011 11. 0 the p g g Placed lIl Sultof the device to permit of a certain amount of able chamber-providedinthe two casingmemflexibility of the casing parts. It will be bers. This spring is for the well-known purnoted that by placing the screw at the relative pose of preventing breakage of the conducposition shown in thedrawings a considerable amount of movement may be imparted to the front ends of the casing parts without so straining the parts as to break them, whereas if the screw were near the front ends of the parts the same amount of expansion would cause the parts to break. It is understood of course that as soon as the casing parts break and expose the sockets, the device is no longer safe because of the liability of shock or burning of the user of the article.

Because of the provision of substantially equal spaces in the two parts and the placing of the sockets and the expanded portion 11 of the spring 9 in position relative lateral move ment between the parts is avoided and the single screw prevents any movement of the parts away from each other. Because of the substantial identity of the two parts the assembly of the device is rendered easier and the cost of manufacture substantially decreased, and also because of .the use of a single fastening means the cost of production and assembly are materially decreased due to the fewer parts to be handled by the assemblers. It will be seen that the two parts are held with their surfaces in normal engagement by means of the screw or bolt 12, and that rotation of the parts about the bolt is avoided by means of the sockets which are received within recesses in both parts and also by means of the expanded portion 11 of the spring 9, which is also received in recesses in the two parts. Not only is rotation about the bolt thus avoided, but when plugs are v inserted in the sockets they are expanded,

thus causing more intimate engagement of the sockets and the walls of the recesses and avoiding rotation more efiectivelyp It isbelieved that my device will be thor oughly understood from the foregoing description and thedrawings, and while the drawin s show the present preferred embodi ment 0 my invent-ion, I wish to be understood that I am not limited to the exact construction and proportions and arrangements I shown iii the drawings.

I claim:

In a device of the class described, a socke adapted to receive a plug therein and to be expanded by said plug, casing parts enclosing said socket and tending to be forced apart b the expansion of said socket, a single cenfitra y disposed fastening means holding together said parts against said tendency, and means disposed in recesses in said parts and adapted to prevent rotation of said parts about said fastening. means. I

BERNARD F. MULDQON. 

